Hacked phone

I KNOW that my Apple ID has been hacked, as has emails, accounts, home security, you name it. It’s been hacked. Reason: to sabotage my efforts to report federal white collar crimes by biz partner/brother. He knows all my personal info: ss#, date of birth, etc. since he’s my brother. I’ve seen my messages being forwarded to a second apple device, but I only have ONE. As I clicked on to see where else my messages were going, text message forwarding option disappeared before my very eyes before in Lodi see where things were being forwarded. I have cybersecurity proof router was hacked. and so much more. My question is this: how could someone intercept ongoing or outgoing calls? That has been happening. Important people write me snail mail saying they can’t reach me by phone but I have no missed calls or messages. The mortgage co., tax advocate (helping me with tax fraud he committed in our biz), close friends, police officers. I now have burner phone but would like to know how my calls are being controlled. I get how the text messages can be with him having Apple ID, but calls?